Adjustable frame and hinge recess locating jig assembly



Aug. 5, 1952 F. SCHWARZER 2,605,790

ADJUSTABLE FRAME AND HINGE RECESS LOCATING JIG ASSEMBLY Filed July 26, 1949 12'Sheets-Sheet l INVENTOR.

. FRED SCHWARZER ATTORNEYS 'Aug- 1 F. SCHWARZER 2,605,790

ADJUSTABLE FRAME AND HINGE RECESS LOCATING JIG ASSEMBLY Filed Jul 26, 1949 12' Shets-Sheet 2 INVENTOR. FRED SCHWARZER BY %MM% ATTORNEYS 5, 1952 F. SCHWARZER 2,605,790

ADJUSTABLE FRAME AND HINGE RECESS LOCATING JIG ASSEMBLY Filed July 26, 1949 12 Sheets-Sheet 5 INVENTOR. FRED SCHWARZER M ATTORNEYS Aug. 5, 1952 F. SCHWARZER ,7 0-

ADJUSTABLE FRAME AND HINGE RECESS LOCAT ING JIG ASSEMBLY Filed July 26, 1949 12 Sheets-Sheet 4 IN V EN TOR. 7 FRED SCHWARZER ATTORNEYS Aug. 5, 1952 F. SCHWARZER ADJUSTABLE FRAME AND HINGE RECESS LOCATING JIG ASSEMBLY Filed July 26, 1949 l2 Sheets-Sheet 5 INVENTOR. FRED SCHWARZER mam @444 ATTORNEYS 1952 F. SCHWARZER v 2,605,790

ADJUSTABLE FRAME AND HINGE RECESS LOCATING JIG ASSEMBLY Filed July 26, 1949 12 Shts-Sheet e I as 2 iii/WEE L \\\\\\\\\\\\\w m 42\ 37 o 3 ,3? F |g.|

E V 450 38 3 F :9. l2 m 44 45 N 44 INVENTOR.

44 FRED SCHWARZER ATTORNEYS Aug. 5, 1952 2,605,790

ADJUSTABLE FRAME AND HINGE RECESS LOCATING JIG ASSEMBLY F. SCHWARZER 12 Sheet s-Sheet 7 Filed July 26, 1949 INVENTOR. v FRED SCHWARZER 'Q WMW% W a 9 w m W .E EE .TI E. E. L H TW m ATTORNEYS F. SCHWARZER 2,605,790 ADJUSTABLE FRAME ANDIHINGE RECESS LOCATING JIG ASSEMBLY Aug. 5, 1952 Filed July 26, 1949' 12 Sheets-Sheet 8 O F lg. l9

INVENTOR. FRED SCHWARZER WMAwW ATTORNEYS 1952 F. SCHWARZER 2,605,790

ADJUSTABLE FRAME AND HINGE RECESS LOCATING JIG ASSEMBLY Filed July 26, 1949 12 Sheets-Sheet 9 INVENTOR.

A FRED SCHWARZER WMW% ATTORNEYS Aug. 5, 1952 F. SCHWARZER 2,605,790

- ADJUSTABLE FRAME AND HINGE RECESS LOCATING JIG ASSEMBLY Filed July 26, 1949 12 sheets-sheet 10 IN V EN TOR.

FRED SCHWARZER BY ATTORNEYS Aug. 5, 1952 F. SCHWARZER 2,505,790

ADJUSTABLE FRAME AND HINGE RECESS LOCATING JIG ASSEMBLY Filed July 26, 1949 12 Sheets-Sheet 12 IN V EN TOR.

FRED- SCHWARZER BY ATTORNEYS Patented Aug. 5, 1952 ADJUSTABLE FRAME ANDI IINGE RECESS LOCATING JIG ASSEMBLY Fred Schwarzer, Montgomery County, near Pottstown, Pa., assignor to Warren B. Zern, Montgomery County, near Pottstown, Pa.

Application July 26, 1949, Serial No. 106,836

' 21 Claims. 1

This invention relates to apparatus for clamping; ajamb of a door frame to the door for cutting hinge seats and has for an object theprovision of an apparatus which, with a minimum of adjustment and manipulation, automatically fixes templates in position for rapid and accurate routing or cuttingof the hinge seats in the jamb and in the door.

In the earlier patent, No. 2,427,081, there is-described an apparatus for cutting hinge seatsin a jamb .and ina door and that arrangement has proven reasonably successful in practice. However, much was left to be desired by way of Sim-.- plification of procedure in getting the hinge jig assembly in proper adjustment for the cutting of the hinge seats. In practice it has been found that the use of templates alone will not speed production unless they can be fixed in position in less time than would be required for accurate measurement of the locations of the hinge seats.

,In accordance with the present invention, the hinge jig assembly incorporates numerous features, all of which contribute to the provision of -a foolproof hinge jig assembly in which the operator is more or less compelled to carry through the setting-up operation in the proper procedure, thus avoiding errors which would re sult in misadjustment of the templates. I

In carrying out the present invention in one form thereof, thehinge jig assembly is provided with a frame member whichmay be adjustable as to length and which is adjusted to a ,lengthat least equalto that of a door. Template assemblies are adjustably secured to the frame. ,Each template assembly has a subframe, onesection of i which. extends over the edge of the door and the other section of which engages a side of the door, thus providing for temporary suspension of the frame on the door. When so temporarily suspended,,endlocators positioned one at each end of'the frame are selectively operated so as to press an end of the door against .a.door-1o.cating surface to fix the position of the frame lengthwise of the door. Located adjacent the, endlocators are door-engaging clamps which are then actuated to clamp the framein secure fixed. relation with the door. The endwise location of the frame relative "to the door "is not only -im"-. portantfrom the standpoint of-accurate location of ea'ch'of thetemplateassemblies but also for the-location of the jamb relative to the door...

For-"example,- some clearance is ordinarily provided betwe en thedoor and the frame, particue larly' at the upper and lower ends thereof;- *To' provide -suchclearance, thereis arranged a'jamb locating arm at each end of the frame movable" into engagement with the jamb-tolocate its position relative to the' frame and thedoor. -More particularly, brackets extending outwardly, from each end ofz'the frame provide for the placement of the jamb. thereon for .themovement ofa selected jamb-locating arm against the jamb to position' it-relative to the door. The arrangement is such that one end of the jamb extends'slightly beyond the upper end of the door by an amount which .will provide the necessary. door clearance.

Each template assembly includes a supportextending outwardly of the doorandaway fromthe frame for the pivotal support. of clamping assemblies. There is a clamping assembly-associated with-each template assembly. Initially,

, the clamping assembly is rotated about its support to its elevated position where it: is held during the insertion of thejamb or placementof the jamb on'thebrackets.

The clamping assembly itself is novel and:cooperates with the other componentv parts-ofthe assembly in a-manner which will now beset forth. The clamping assembly is provided with a central pivot which permits rotation ofthe' body portion thereof-to a position at right angles to the axis of .the support, and while. atflsuch right-angle position it maybe rotated upwardly out of the way of the jamb. The clamping-as sembly includes a movable jaw for engaginglthc edge of the. jamb, this jawr .includinganeXten:

sionwhich; cooperates with a recess to. hold each;

clamping assembly in the upper...e1evated position. After location of the jamb on thesuppo'rts, each clamping assembly is movedto lthelowcrmost position and the body .por'tion. turned through to .bring one armofa. crank beneath the jamb which is then. resting on .itsbrack'et.

By means of an operating handle each crankis; then rotated upwardly to engage the jamb to lift it against locatingsurfaces disposed "below-each template. These surfaces on the template are preferably formed integral with one section 0f thesubframe thereof. When 'the jambv rests against the locating surfaces. .theslidablejaw :is;

then actuated to press the jamb-against thedoor.

' The slidable jaw will. not .be. actuated'untilzthe jamb comes to rest in its elevated position against the locating surfaces. Since. theactionof the clamp for the jamb'depends upontheframe. and each template being. .held in fixed position, it will be seen that. if one forgets to actuate the end-locators and the clamp at the end of" the frame member, the clamp for the jambwillnot properly function and there will be avoidedany likelihood of an effort to cut hinge seats witl-ithe apparatusout of adjustment. l

There are many other and further objects and advantages of the invention which will be set forth in the following description taken in conjunction with the accompanying drawings, in which:

Fig. 1 is a perspective view of a door, the lamb and the hinge jig assembly with the parts-thereof in position for the cutting of the hinge seats;

Fig. 2 is also a view in perspective, and in this instance shows the hinge jig assembly as viewed from the opposite side and from the opposite endfrom the view in Fig. 1; the operator is shown in the process of inserting the jamb into the hinge jig assembly preparatory to clamping the jamb into position against the door; r

Fig. 3 is an elevational view of the right-hand door end-locating assembly !9 of the hinge jig shown in Fig. 2; I Fig. 4 is a plan view of the door end-locating assembly of Fig, 3;

' Fig. 5 is an elevationpartly in section, of the door end-locating assembly taken from the right of Fig. 3 with a part of the'ca'm lever omitted; Fig. 6 is a view in perspective of thev end-locating assembly' of Fig .=3 with the pressure shoe in a'retracted position, the jambelocatingarm inits lowered position, together with a fractional portion of a jamb and a door, the latter being shown in phantom;

Fig. '7 is an enlarged fractional view of the right-hand end of the hinge jig assembly showing the respective positions of the door, the lamb,

and one of the template assemblies with the clamp assembly for clamping the jamb into posithe door shown in its elevated position against tion; 1

Fig.8 is an enlarged end elevation of the jamblocating arm with its jamb-locating surfaces engaging the edges of thedadoofthe jam b;

' Figs. 9, l0 and 11 are detail views ofthe clamp assembly respectively illustrating the position of the variousparts thereof when the clamp is in its initial, intermediate, and fully clamped position} .Fig. 9a isa fractional view of the jamb-engaging end of the clamp of Fig. 9 with'the clamp shoeshown in its extended position;

12 is a sectionalpview of the clamping assembly taken along the line iii-l2 of Fig. 11, withga fractional portion in phantom shown after rotation to an elevated and inverted position;

Fig. 13 is a sectional view taken along the line l3l3ofFig-. 1l; e

' Fig. 14 is a sectional view taken along the line Ila-Moi Fig. 11;

Fig. 15 is afractional planview of the channel members of the right-hand half of the hinge jig- -frame and a handle associated therewith; the

remaining portionof the hinge jig frame bein shown in Fig. 15a; 7

Fig. 15d. is a fractional plan view of the channelzmembers of the. left-hand half of the hinge jig frame with portions of the door end-locating assembly and a handle'cutaway;

Fig. 16is a sectional view taken along the line l6 l6 o f Fig. 15; j a

Fig. 1'7 is a sectional view of the center channel section taken along :the line l'il'l of Fig. 15a; Fig. 18 isa sectional view of the left-end channel. section, for the hinge jig taken along lines |8|8 of Fig. 15a;

. Fig. 19 is a plan view of a template assembly for the hinge jig; 7

Fig. 20 is an elevation'of-a template assembly mounted in position on a channel of the frame, part of the latter being cut away;

Fig. 21 is a sectional View taken along the line 2 !-?.i of Fig. 20 with a router shown in position for cuttingor routing out the hinge seats in a square-edge door and in the jamb; V

Fig. 21a. is afractional view of Fig. 21 with a beveled-edge door and jamb in clamped position;

Fig. 22 is an exploded view of a locator block ortempiate stop;

Fig. 22a is a section taken on the lines Elia-22a of Fig. 22?);

Fig. 221) is a front elevation of the block of Fig. 22a;

Fig. 23 is a perspective view of the block of Fig; 22 in reversed position on a flange of the channel frame;

Fig. 24 is a plan view of a clamping accessory or filler block assembly;

Fig. 25 is an elevation taken from the right of Fig. 24; and

Fig. 26 is an elevation, partly in section, showing the clamp, filler block and template assemblies in cooperative relation with the door.

Referring to the drawings, in Fig. 1 the invention has been shown in one form as applied to a door If) and a door jamb H which has been properly located with respect to the door preparatory to the cutting or routing out of the hinge seats on both the door and the door jamb as by the router 5!. The door id is held with its hinge-receiving edge Ifia in horizontal position by suitable means (notshown) such as clamps attached to the base of a work bench.

It will be observed in Fig. 1 that the template assemblies l2, l3 and. I' l extend over the upper hinge-receiving edge lea of the door and outwardly over the upper surface of the jamb ll. Clamping assemblies 2? are secured, one to each of the template assemblies l2--|4, though the one for assembly 52 has been omitted in Fig. l. The three clamping assemblies 21 cooperate together to hold the jamb H upwardly against low-er jamb-locating surfaces on each section of the subframe of the template assemblies l2l4, and the clamp also serves toclamp the jamb H tightly against the hinge-receiving edge fia. The hinge jig assembly as a whole is tightly secured to the door by rotation of clamping knobs 26 located at the respective ends of the frame, these knobs serving to actuate the clamps into gripping engagement with the door. It will also be observed in Fig. 1 that there is provided at the head end of the door a jamb-locating arm 39 to which is secured an abutment resting within the dado 29 of jamb H for accurate location of the jamb H lengthwise or" the door. Tliis'lengt-hwise adjustment provides for the clearance at the head of the door and below the doorf'rame to insure freedom of the movement of the door to and from closed positions.

With the parts in the positions shown, it is only necessary to lower the router 5| into each template assembly quickly and accurately to form the hinge seat in both the jamb II and the upper edge 10a of the door. After the hinge seats have been routed or'cut, the three of them takin less than about a minute, the apparatus may be quickly and readily removed from the door. The first operation is to lift the operating lever of the clamping assembly 2! by means of the'knobs 48 torelease each of the clamping assemblies. These assemblies 21 are then turned and lifted to the position shown in Fig. 2 by reason of constructional features later to be described in 'detail. 'fllhe :clampingi :kn'obsji Zfi-zzare then lo'osened.- Witheth'e clampingzassembliesufl in their elevated position, the iambi may' be removed; and the Ej amb debating: arm :maised to its elevated .position. rlto. correspondnwith {the position. of the arm 30:5atzthezrighthandzend;of theijigsassembly :of' Fig. ;1. .Anioperator; y grasp ingitwo conveniently located handles 1and159, maythenxbodilysliftthegframe-including. heiitemplate assemblieszzofieof. th'eadoor. Thesi'doorais. then memovedxaind: another .jdoor placed: inspoe sition'g. :that -.is;. -:it fiszclam'ped to:' the '-work-2bench to-lholdsthe hingesreceiving ledge aaimtherzhorizontal. position .asgshownainfF-ig;1. .g-Thegjigsassemblylasralwholeeis1then lowereobontojth'exdoor I ll; 2 Just .priorfto: lowering; of;ithe..-rassembly.casea whole: OIL-tOLLthB;d001'1:l.fi;2l2h&kIlOb24 ofithe rendlocating .Eassembly ;:l:.9:.isdifted.;to. the elevated 110-. sition tocretractrthe:shoezxZl, :EigLBl; :Witlnthe assembly :as .a whole relatively. loosely mounted onithe door; the 'knobx24 :of: the locatorjz-as'sembly I 9.-'.is:moved to the position shown-in Fig, ,2... Duringnthis. movement the lpressure shoe .21,- Fig; 3, moves outwardly against: the. .door "to. -p111l,:,the. frame ,a's. a:,who1e ,to ,the right-f. :the; door as viewed by the operator in Fig; 2, andto; bring the-locating surface ZOaof-the left-handlocator assembly l8 againstthe edge of. thehead endgof thedoor.

:The door end-locating assemblies,,l8, M; are similar. in:v construction, the only exception being that; one is a rightehandassemblyand the othenis a left-hand assembly. (Assembly, Ill-will bereferred to as .a left-hand, assembly, it p beingto theleft 1101 .the operator, ,and assembly ;.I 9. will be referred to as aright-handi assembly, it being to'thezright of theoperator.

iIn'Figs. 1. and 2a leftshandsdoonhas; been shown. Right-hand and: left-hand. door -;a;re termsrwhich refer to the-swing of. the door; and may be, defined :as;follows: When facing {3" closed door ISO that'it will openawaygfromthe-observer; the position of the .hinges relative to-thepobserver, leftorwright, determines the swing 'of the door. 'In,:setting-u-pthehingejig assembly preparatory-to cuttingythe'hinge seats in the door and-jambthere are two-steps ,orrules to .beqfollowed. -The first -is thatg all the doors; Whether left-handror right-hand; 'are to be placed-in ,the

hinge jig assembly soathatthe-locatingmay-be done from the headzendwf the,-;do or.-.' Thehead endof 3the1-door-is that tend which is-gcommonly referredrto; as thetop when the finis-hedwdoor isj-hunginits frame and is--characterizedin-.the-

conventional panel type door=used.-- in:the home. by the narrow cross frame member ,or: rail-asdistinguished fromthe wide-cross frame member orrail at the bottom-of the door. .Ihesecond step to, be followed concernsthe swing of the door; that is, whether' the door is to lee-alofthand or right-hand door. Iftheadooris-to be aleft-hand door, as previously defined, the-head end thereof: will be located within-the door endlocating-. assembly I 8- to the left -.of. the operator, Figs. 1 and 2, and ifthe'door is .tobea, right-. hand door :the head end-will belocated. within the door .end-locatingsassembly 1.9 to. the r-ightot the operator. Thus, by following these .two sim: ple rules the operator-is readily ableto adapt the. hingejig assembly to either-rightshand-or lefthand doors. 7

THE END-LOCATORS zmosmo necte'd,-. as byjjscreyvs, tojthe; corresponding-1cm. ofietheshingeiig frame. There.zextendsgthroueh theiramerZ 0;;Figs... 3+7; 10f ieacih "of .ithe dooraendlocating assemblies [8, .I 9. a locatingrpressureshoe 2'1 .operated by Tabam ,zza ofacamzlever 3.21am drivenabyfanjoperating camgllnky23. .'.I.,'he cam lever. 5.22,; ;:is 5 provided rwith -a: ballwknob :01. handle 24. When ;;-the-ehand1e;-;24= of dQOIgzfiIidelOCflfi-Il assembly '19 is in ;-'i;ts;.lowered .positionyfthepr sure; sheet-2| ;-is;;t.hrust forward; to its; -;extended position-l. bygvimeans of compression: spring; .25. With .the hand; 2410f :th'e :enddocating; assembly elevated-;-,as shown :by broken lines inv Fig-.: ,3-,1:the pressureshoe 2 l :iswithdmwn-to apositionfiush with;:-. r-s1i. l1t1y behind..- thelocatin :surfacefla of: thewend+locating1frame. 2.0.; Ithas beenfshown in-;Fig,.-6. nxthe withdraWn-pOSitlon.

:IneE ,.--knob 24 of. enti locating assembly l9 isshowrn nitslowermost-position, while. the knob 2410i ithe :-assembly- I 8;;is ,shown in,-. :i ts.-u lpnermost; position. Accordingly, with the ,kniobsrso located and with the,w understanding of the endlocating assembly gained fromadetailedconsideration of Figs; 3 -7, it will be {seen thatspring pressurefis applied to the lower; end of'the-door Illthrough. pressure shoe 2| of end-locating assembly 1| 9, the reactive force against the endeloeating; assembly [9 being applied-through the frame; comprising channel members 15,; [6,; J1, Fig. 2,. ,to move; the: hinge jig; assembly toward the lower end; oflthe door 10- until-:sucnmovementis stopped" by accurate locationof:thepupp r. 01', head end-of th or s zthelocatin surface; 20a; (Figs; 3; and 6) -of frame .2.0-;-,of the ndelocat neassem lyI8.

'Withthe door now located asdescribed-,a hand knob,- 26 of; each of the end-locatingeassemblies l8, I9; is :turned to tighten the; clampmember 2-;6a,- Figs, 3;. 4 and-' 6, to hold theframe in fixed position on the door; Thetemplateassemblies 12-14 are. then again in correctpositioniorthe routing of the hinge-seats; 1The nextstepisthe insertion; of the-door-jamb l l. 7

- their elevated-positions and .01117' of: the.:wayof.

the-movement of the door jam-b l-"l :into its spreliminary-.-po'siti;on onto the brackets; 28 extending fromweachy of theyendelocating assemblies i8; I 9. Each; bracket 28, Figs.;3 and v5,i=is positioned: in "a V socket'gprovided. therefor in-i'the' frame-.129- of the corresponding endelocating assembly andzis adjustable as to height to accommodate *jambs .of difierentthi-ckness. A socket'head cap'screw'28a. is provided vto lock ge'achrof thebrackets .2 8 in .the desired position. .Withthe 'jamb I l against the door and on the brackets. 28,v it .may'beamoved lengthwise of 'the door "l0 toslocate it. relative thereto; andsitslocation-is automatically accomplishediiffof the dado type; best seen in Fig. l.

The dado 29*:is locatedat the upperor. top end of. the *door; .The end-locating assembly l8 carriescthejamb-locating.arm;.3ll which is biased downwardly. by avtension .spring similar. to the spring 3| of end-locatingassembly l-9 'shownin Fig; 5; The arm 3.0; bymeans of .pinorscrew 33, carries a cylindrical member or [jamb-stop 32, similar to, thatishownl in Fig; 3, one side thereof having; a fiat face in' the direction of: the glower end: of. the door, randonsthe opposite side of: the

' arm. and on the .sarnexpin or screw-.:3'3 isaconi'cal shaped threaded member 34. The arm is pivoted by the pin 3011 which extends betweenbifurcated ends 302) of the subframe of the endlocating assembly l8," Fig. 1, and as may. better be seen in connection with assembly |9 in Fig. 6.

In order to rotate the arm 39'about the pivot pin 3811 there is provided a'lever having downturned extensions 35a which help pivotally vto mount the lever 35 by preventing sidewise movement when it is rotated- The lever itself is pro vided with a cross member 351), Figsri and 5,

which extends beneath the arm 38 and has ex tensions 35c projecting outwardly from the downturned members 35a. These extensions 35c serve pivotally to mount the lever 35 on the upper surface of the frame 20. Thus, when the lever 35 is rotated in a counterclockwise direction, as viewed in Fig. 5, it will be seen that the cross member 351) will engage the arm 30 to move it in a clockwise direction about its pivot 30a and against the bias of the spring 3|. Since the cross member 351) has a narrow flat surface the pressure exerted upon it by the spring 3| and through the arm 30 will hold the assembly in the releasing position as shown at the left-hand end of Fig. 2. While lever 35, Figs. 4 and 5, is held in position on the frame 20 only by means of the arm 30'under the bias of the spring 3|, nevertheless, it cannot be accidently displaced from its position by continued movement of the arm 30 in a clockwisedirection, Fig. 5, as the hook 3|a which connects the spring 3! with the .arm 30 will strike the frame 20 and thereby eliminate any further clockwise movement of the arm.

The arm 30 is positioned between the upright bifurcated extensions 20?) of the frame 2!] as may best be seen in Fig. 4. The extensions 2% accurately locate the arm 3|! perpendicular to the longitudinal axis of the hinge jig assembly to insure accurate location of the jamb dado with the top end of the door. The extensions 2% also provideadditional lateral support for the locating arm 36 when the jamb is moved lengthwise of the door in orderproperly to locate the jamb stop on the locating arm 30; Fig. 1, firmly against an edge of the dado on the jamb.

The end-locating assembly l9 also is provided with a jamb-locator similar to the jarnb-locator of end-locating assembly l8 described above and is used in locating a jamb in relation to a righthand door as shown in Fig.6. In that enlarged view the positions of the parts are clearly illustrated, and it will be observedthat the edge 29a of the dado 29 engaging the cylindrical member 32 is spaced upwardly from, or to the right of, the top of the door It a' slight amount. This spacing provides clearance for the door ID for freedom of movement in and out of the door frame after final mounting of the door.

It will be seen, Fig. 2, that the arm 30 of the jamb-locator at the lower end of the door is in an elevated or inactive position for the left-hand door 10. It thus becomes apparent that when a right-hand door is being prepared for hinge seat cutting as shownyin Figs. 6 and 7, the head end of the door is located from end-locating assembly I9 and the j amb-locator thereof is lowered to its active position, shown in enlarged view Fig. 8, for engaging the edges of the dado 29.

As already stated, when a left-hand door is being prepared for hinge seatcutting the head end of the door is located'from end-locating assembly l8 and the jamb-locator thereof engages the. dado in the same manner 'as shown in Fig. 8. In all cases, the jamb-locator on the end-locating assembly at the;bottom.of the door, whether lefthand or right-hand, is raised to itselevated or inactive position.

With the jamb located in its final lengthwise position-relative to the door ID, the next step is to clamp it in position preparatory to the cutting or routing operation of the hinge seats. This is accomplished by means of the clamp assembly 21of each of the template assemblies |2-|4. Each clamp assembly 21 is characterized by a double action; that is, one which first presses the jamb upwardly against the locating surfaces on the under side of one section of the subframe of the template assembly, and then firmly against the door Hi. In this manner there is avoided any space between the door and the jamb during the routing operation and there is assurance there will be no surface breakage as the routing tool moves from one to the other.

It will be observed with the clamp assemblies 21 in their elevated positions, Fig. 2, the righthand end of the hinge jig assembl being shown in the enlarged view, Fig. 7, a latchi3l, Fig.. '7. secured to the horizontal jaw 38, Figs. 9 and 10, engages a locking recess 39a in the locked collar member 39 to hold the clamp assembly 21 in its elevated position. Thus, the horizontal jaw or clamping member 33 and its spring 40, Figs. 9-12, form a cooperative part of the latching mechanism to hold the clamp assembly 2'! in the elevated positions shown in Fig. 1. The jaw. 38 and spring 40, Figs. 9-12, are mounted for horizontal movement within the central portion of the body member or frame 4|, a sectional view of which is shown in Fig. 13. One end of'the spring 40 is connected to a pin 4|a which extends between the side walls of the body member 4|. The opposite end of the spring 40 is connected to a pin 38a of the jaw 38 for movement therewith and relative to body member 4|. The curved surfaces on the latch tip 31a, Fig. 9, and the collar member 39 provide for a camming action for release and application of the latch in rotating the clamp from its upper to its lower position, and vice versa. As may be seen in Fig. 7, each clamp assembly 21 is pivotally mounted by means of body -member 4| on an arm 42 which extends horizontally from the frame 36 of each of the template as semblies. Locked collar member 39 is provided with a thumbscrew 43 for locking the clamp assembly 21 into position on the arm 42 and in predetermined spaced relation from the template frame 36. The rod or arm 32 is provided with a flat surface on one side thereof for engagement with the flat end of the thumbscrew 43 to lock the collar member 39 in a fixed position;

It will be noted, Figs. 9-12, the lower jambclamping member or lever 44 is pivotally mounted intermediate its ends by means of a pan Ma tated through with respect to body member 4|, thus placing the axis of clamping member 44 in a plane parallel to the length of the door I0. Thus, when the clamp assembly 21 is moved to its lowered position by rotating body member 4| through there will be no interferences between the template frame. 26- and .the

clamping member 44.

Aft'e'r the 'clamp assembly ZIr'has. been retatedfrom the elevated position-shown in Fig; 7 to the lower positionof Fligs. 9-11,. the: lower jamb-clamping memberz l l the handle 48, and the: actuating :arm 41 all carried :by. the pivoted bracket 45,- are rotated through .90? to. bring. .the actuating arm 47, whioh carries a ,cam..ro1ler 49-, into alignment with. the horizontalijaw' 38 and at the same time, bring theulower-jarnb-iclamping member 44 beneath the jamb .l I; With the partssopositioned, Fig; 9, the. ;handle.148' is rotateddownwa'rdly. The: roller lfig lpivotally mounted on pin 49a, engages the rear-end of the horizontal jaw 38 and temporarily serveslas a fixed-fulcrum about which the handle; A8; .ro.. tates. This, rotationmoves the. right-handrarm of the crank or lower clamping membergl l'fi u'n ai -clockwise direction. against the bias ofspring 46; elevating the leit-handarm thereof .upon which is mounted a clampingifootzilll, and lifting or applying an upward force againsttheldoor jamb -I I. The clamping foot idispivotallyi 0011-. nected to the crank arm 44 by means of a' pin 50a, the purpose of which will ,be hereinafter described.

As the handle 48: is rotated further, the horimarital-jaw.38v is moved .to the left toward andagainst. the door,- j amb I l I; against the bias. of the releasing spring: 40. This occurs when-thejamb comes. -to-rest against the under surface njgne template: frame. This movementis continued until theyaxis of the roller lfi-is moved above-the axis-of the pivot 47a, so that the-bias of .the spring-. 40 then tends to. continue, the movement of;;the.member-4'1 in the same direction and thus forms a--.-se1flockin. .3r arrangement. -to hold the clamp; in the clamping position, The leverv will is? bifurcated,v the outer solid end-thereof engaginggthe: clamping lever 44 to--bring .the-parts t0.-:standstill. As aforementionedall-,of .the clamps 21- are identical and theyyare; operated inca similar fashion.

W-ithall the clamps ll positioned as described and-yas' shown in Fig.1,the :jamb- ,ll isgproperly located .with' respect to the door. 10,. and .-.the router. .5l--maya ain be used to .cut-or routout the... hinge seat. The router itself is. of conventional design, Fig.. 21, and comprises :a,.bit

SZEieXt'ending. through a uide. p r i is; lowered upon .the upper. flat surfaoe =of--.the template -.as sembly'. It, will be;.observed- 'that the -router.z-bit .52 extends through, a-- stationary guide; bushingrE-fi. which engages-the edges of the. .openingin the: template .55; accurately, tolocate: the router; 5 l. during, its movement through the. open areaaofxthe' template. ,Wi-th =t-he:.rout er 513.1 lowered intogpositiomthe:fiat 'surfafle. of its guide .plate 53 is pressed. against; the =upper fiat surface of the template 55 andiztheitemplate frame. 36. This; insures :.that the-(bit :52 ",extendsi at right. angles to the..- face.oi..,the-.-.tenr1.-

plate.u55-.* The router 5111's thengbriskly moved aboutthe edges of theopening' in,..the;:template 55,=an'd:it* is then moved; back sandifoirth until all ofatne Wood in the Jamie and: .th'eidooriwithin that area-has been removed to apredetermined dept-h to 'form :the completed :hinge seats-:56; '51, Fig-21. The size of .openingin the template 55 Will be -proportionately larger than 1 the. size of l the hinge in order to allow 7 for the thickness of the guide bushing I 5d. 'In I determining-the depth (if-setting forthe router bit -52. I allowance is made for-the depth of the-tem-plate assembly gangsta:

id in; addition :toix-theathicknesss Dune; .hingeihin installed? The hinge.:.seats:.,.themselves. .are formed parallel 1701311116. surfacexof. template; 55

which is located cat .=ani;;angleoslightlyzrgiteater than a right? angle Wit-HITQSPQGYG to: the: sidesgof the door, Etheepurpo'se. thereof: toxbe hereinafiter explained; I x-.;.. After' the? hinge;v seats have: been completedugit is: only necessary" -.to .1 releasetthe' 1 clamps 3211x5133! raising -v the" handles .4'8;;move;them to their'pqsie tioheshowm iirSFigJZ' and releaseithegitwmer-ld clam-psaof ithemd'ooii- .endelocating: assemblies'iziai l 9 by: the! hand knobs 26;: Theijambfl l.:is.1then removed and vthesopera-tor lgraspsztherhandies 5.8, BB eXtending .iromi'theaichannelq sectionsv 15,215; Hi: of: the jigiiframec .andiliftsi the hinge. assembly from sth'e idoor'. The@.door. l10;;insoa1i- -as=:the hihgesaiie' c'QIic'ernedL-isIeady;tube hunge The operation is s'peedy'; andtaccuratgzandinf practice hinge seats -.may. 'belcut in doorsand j'ambsein a very-short time, ior'zexample'the entire'setting: up: and: routing operations: maybe compjleteds-in twofminut'es. 5 I I r ffii V ESA' Y I OF HEHIN E."' JIGASSEMBLX". The; .rersatilitysofi;the. hinge: .i ahassembl izi adequate also toitalsewarezof doorszand ian l pf Widely-1 difiering.;:dimensions..; .he.r n e :j fg semblyg issadaptable.forgusezon doorsgi-o s 7 length as well as difierent thickness I go adaptable for. useionsiamhs. otdiffenen w d h-lan thickness....Its,.versatilineisadequateal 12to.take care: of-.-doors-;.the;hin esreceivingedges otwhicn may beieither beyeledonsd a e; and a 9. 201 on has i'beeri' manager: adantineg -the iigrfor the cut ines-o hinge:S8a;l3S inn .donr aloneswhen therd or isltoaberihungqfrom ametalainames .The ne es: sary:adiustmentsaand the ieaturesr requir such. :zersatilitx willznow'bedescribed;

m de no of;,three: henne1-shaned :se io if 15$ l1,;Fig.-a2,. ;which may be. adjustedginErelatio to each other; .imnrder; o varyrrthei otalll nst. o the; hin e: Ji The. enter;,channelzjsections' whionthe: twonendisections li and-1.1 lrslid .ies; 1'5.-:18;;-iis-.provided';witln a series of locating holes orpzopenings-xfillaefilldzandzfilusfillmliigs. 15,3512, spaced one-inclrap artz'at the; respective endsiiltd; I612 ofrtherentenchannelizl E.T.h&'S hfi;IikS 62*;anjd 63 of; handles: 58: and L159 have. been. 'shownsin'z sertedin. the; openings: 60d .and' 61min Fi'geslfi and 15a. i 1

If it be assumed that. the door. l0..which has already been described in" detail is 'a' seven-foot door.:;and.-;that;;itais:new desiredio "c.ut..-the hinge recesses? fOI'i-fi-CfiiXffOlItf;'teIkinCh'IdQQr; a1l::t-hat, .is necessamris: to.. rotate .the;:'fiV V.0i:haI1d1ES3158,.1595315 the center; ofsthei assembly; until theithreadedend ofilthe: shanks-;-62;:: 6:35 are: .unthreaderhr'f-zromri the inner threaded openings in thibottonnilu'gsefid andlfifi;irespectivelyfcarried byithe bottonuflanges of the: end .channels ilft and: f l 1; Figsmfetnd 1 6. Lugs-.1655 and .61 are carried by thetlu'pp'e'r flanges of, channels: l5. and H; :and the: openings-therein are-aligned .withthe o'pen'in'gs'in" the orr'esponm mg bottomulu'gs fi l and 65. 'I-he openih'g' iri the upper lugs .66 {andxfil are not threaded and are of sufli'ciently :la'rge diameter to'tiprmit the threaded endsof the corresponding shanks 62 and B3 topass freely therethrough. The handle 58 and the shank BZarethen'remoVed and the end channel 15 slid relative to the center channel lfito the next openin SOs-located one inch therefrom. The shank 62 is inserted into the newly aligned openings and the threaded end returned into threaded engagement with. the threaded opening in the cooperating lug 64.. The upper-end of thestud or shank 62 is provided with a shoulder 52a, Fig. 16, which engagesthe surface of the upper lug .66 attached to the upper flange of end channel I5. By rotating the handle 58 in adirection to tighten the stud 62, the upper and lower flanges of the end. channel 15 are pressed toward each other and against the corresponding flanges of the right-hand extension 16aof. the. central channel I6, Figs, 15 and 16, lockingthem together. Similarly, the other hand1e59..i's removed, the end channel .11 is slid along the left-hand extension lGb, Fig. 15a, to the adjacent opening Blc one inch .away for alignment of the openings, and the operation .repeated. Since the handles 58 and 59 are identical in construction, only the handle 58 has been shown in detail in Fig. 16. After the simple foregoing adjustments, the hinge jig assembly is then in readiness for operation on doors of lengths of six feet, ten inches, the remaining operations thenbeing repeated to rout out the hinge seats.

For adjustmentsintermediate. the standard sizes it will be observed, Fig. 16, that each of thelugs 64 andtfi projects outwardly from the channel .I 5, the lower lug 54 being provided with an outer threaded opening 64b and the upper lug 66 being provided with an outer 'unthreaded opening 66b of suficient size to receive the intermediate diameter of the shank 62. A'similar arrangement is provided by lugs 65 and B1, Fig.2, on channel H. The end channels [5 and I! may be adjusted to any desired position with respect to the correspondingextensions 16a and Iiib of the center channel It by rotating the handles 58 and 59' in a direction to tighten the cooperating threaded members, and the resulting clamping or squeezing action will lock the channel sections securely together.; In this manner the hinge jig frame may be-adjusted to any desired. length to accommodate doors of other than standard lengths. Scales are, unnecessary forv this adjustment Since the l distance between the. outer or end channels 15 and. I1 andthe center channel I 6 may be readily measured for accurate positioning-.for the intermediate non-standard size doors. The purpose of the scales which do appearon the surface of the upper flange of the channel sections 15, i6 and I! will be hereinafter described.

B. The template assemblies 7 For heavier doors, it is frequently desirable to use three hinges. Accordingly, it will be seen, Fig. 2, that two template blocks 68a and 68b have been provided in the intermediate position on the central channel. 16 for cooperation with a third template assembly. I As shown in Fig. l a third template assembly it, together with its clamp 21, canreadily be located in the central position on channel [6. Each template assembly is similar in construction and is provided with a hook-shaped end 69, Figs. 2,20 and 21, arranged to receive thechannel betweenit and the downwardly extendingsection of the frame 3 6, Figs 20 and 21. Whenso located, the clamping members H. and 12,- Figs, 2 and 20, overlap the upper edge of the channel. It will be observed that .the clamping members H and 12, Fig. 20, are provided with slots Ha and 72a so that they may be lifted above the upper edge of the channel for easy mounting-and removal of the template assembly M as a whole. When they are dropped to their lower positions, they are tightened against the channel by means of thumb screws 13 and 74. Before tightening the thumb screws,'the template assembly as a whole will be slid toward the top end of the door until engaging the positioning block 68b, Figs. 20 and 2. During this movement-the hook or latch 15 rides over the top of the block 681) and drops into position on the opposite side to anchor the template assembly in place. A similar latch or hook to is provided for engagement with a posi: tioning block 5812 when the top of the door is located at the opposite end of the hinge jig assembly. This is a desirable safety factor to prevent movement of the template assembly in the event the thumb screws l3 and 14 should become loosened at any time during the set-up and routing operations.

C. The locator blocks ing a routing operation for a left-hand door;

Each of the locator blocks 68a; and 682) are identical in construction. As best shown in Figs. 22

. and 22a, when the locator block 6822 is positioned over a locating hole Tib in the channel ll preparatory to locating template assembly M for the routing of a hinge seat in a standard location, a knurled head 18 is rotated to lower the end of the threaded stud it into the opening Tlb, Fig.22, to fix'in definite position the locating block 682) with respect to channel I1. As the knurled head 78 is rotated, the unthreaded end 19a of the stud l9 enters the hole ll'b in the channel I! and the knurled head 18 descends toa position flush with, or slightly below, the upper face of the block a body 86. Unless the knurled head '18 has been so lowered, the cooperating hook 75, Fig. 20, on the template assembly l4 cannot be moved over the block 5827 for locking engagement behind it. This provides a safety feature to insure accuracy of location of the blocks and provides an immediate indication if an effort is made to use the hinge jig assembly with the blocks out of their proper locations.

If the doors are to have their hinges mounted in standard locations, for example, if the top of the upper hinge is to be five inches below the top of the door and the bottom of the lower hinge is to be ten inches above the bottom of the door with the middle hinge located mid-way between, it is to be noted that even if the frame be adjusted for doors of different lengths, the locator blocks will still be in the proper positions for the standard locations of the hinges. The reason for this is, as will be remembered, in adjusting the length of the frame to doors of a different size each of the end sections 15 and I! are movedthe same distance with respect to their adjacent ends of aposrzeo 1118 the-ncenter sectionror .cliannel: Hi. i Thus theA-Iocator: blocks on channels I and 'lifforvthe upper a ==fixed -position relative to their corresponding endsi or. the "frame, and the locator. blocks ,on the center: channel it will continue. tobe centrally OthSILthELII in: standard locations, .the positioning blocks 6.8a; Gab/provide the. requisite; flexibility. Inxsuch cases, they knurledtheads; [8,. Eigs..22,,.22a

and1 22b, are rotated to bring the unthreaded ends 191a in .spaced: relation with. the: inner slotted areasofthe-blocks which receive, the; upper flange of "the; channel sections; The .blocks tea, 68?) are removed and turned to ,the inverted position. Imsuch: position; HSAShOWH by blocks B81) in :Fig.

-23;"it;:will:be observedithat the inclined-endwfl of: thei pivoted center member 8 I has anarrow 82 which'registers witht-a-scale 83b stamped on the upper flangeofithe channel It. Each of;the

endchannel sections l5 and. H iszprovidediwith and lower locationssoithe hinges willremainnin two: ;scales 83a, 83b -and:-84b,.-8e41r respectively for use with the corresponding channel blocks-168a andrtflb. v Therscales .1831 and 83b arezlaid out T4 the scale 88b,iFig'..=15-lr,;:is laid out withzrefierence to; the left-hand .endrthereof. hinge seats fora right-hand door the template assembly-l3;:-Fig, 1; willbelocatedwith respect to channel block 68a which is provided on scale 880,, Fig. 2. Similarly, when locating ithe template =assembly 1 ll 3' with respect to a left-hand doorrit will, .be. positioned against the-channel block-fiBUwhich cooperates with scale 88b of channelsl'fin. r

D. Ddors o different thickness ,Since;}it is;-not uncommon toshavedoors of differentzthicknesszand, :asxis quite oftenthe-case; toihavezthem used: 'on thesamejob, the'hinge j-i'g assembly is provided'with the requisite-flexibility tma'ocommodate the variations in thickness.

- It" willrbea assumed Jthat the doors, the operations on :whichshave alreadybeendescribed; have a:-thickness ofwoneland three-eigh'ths inches; If doorsiaof: the same length be used but of greater thickness;;for example, one and' three-quarter inches, it is only necessary to'r-emove the two counteresunk screws 89,89, Fig. 19, extending into .theytemplateholder or slide -90 for removal of theztemplate 55l'-itsel f,-'and forthe insertion oflaldifferent template with an opening designed for a's-larger size hinge which it isdesired to use onithezheavier and thicker door. This arrangementx has the advanta'gethat doors of diirerent dimensions mountedc with"hin'geszof different with reference .tothe right-hand endtofxthe hinge jigs-frame, and: the: scales: 84b and B l-ac are. each laid out with: reference to the .leftf-hand. end of thethinge jig frame. ScalesBSarandMbaresimilar, asnare scales: B3:b-:and 8741s.. whenadjusting thehinge jig assemblyhfora lefthand door it; will be remembered that the locating of: the template assemblies .is performed with reference; to. the channel or..locating .blocks. 68b. Thus-if locatingiblock 68b of channel-J .7= is imoved .to,=,alignment. of arrown,82:rwith a positiononthe .scaleaa'dbrreading si-x inches; Fig. 23, the template assembly-.t iz -Figs 2, will'then be locatedwithreferr-Brice toqthe positioning I block v 6811 at location $65,?apposition; such that.theiiuppermend of ;.the hingeswi'threference to theupperiend ofitheedoor will be ;exactly sixyinches belowe'theitop surface thereof; 1 The. locating block 58b istightenedefid locked in position by a socketchead capscrew 85 threaded into the hinge clamping member 8|, of the positioningblock 68h,-Fig,22a.- By tightening the. screw tfi the end thereof ,will move against the -body 86 ofthe block t'gfibhthus rotatin the clamping' member 8! which; it willgbeaobserved, sr ek-arm Pi 0 -@Q:pi-n% :Thee tionis pos ti e :and provides adequate friction to prevent e ni th reo e n: h hthe template a sembly is moved with great force againstit;

' fi milerln w ib' esh'e t. topthephann l 15 at the-right-hand end,- of the hinge -jig template; as- Semblyl2; Eig. 2 wi ll be ,movedagainst locating block fiilbj which is positioned with respect to a scale, 83b by -setting the arrow of the block-6,81) Qem i a anjin e mnb 0i sea s 81 av e ot;- te a of;the:h n ezwi h-refe ence't thebott end hevdoor illberthes menumber;oi-inches stav the bottom surface thfilQOfifiS: the number indicated-;-by; the ;;arrow ion the; scale-(83b; J The locating-block 5812 is tightened andlocked inpositionin;a. manner as; previously described, H or center channel 5601310112 l6.,;"1= ig'.-v 2,: is also .ided with-apair; ofscalesfifia; 88b4 Theisca'le plaid ,outiiiwith;referenceitoethe ri ht: and tend;

For example,

sizescan bef fitted with hinge seatswith a- 'mini-e mum delay for the one series of door's of' one thickness and another seriesofdoors of a- -different thickness. In the event that -a' fewdoors of-.other than standard thickness, and hinges ofother than standard sizes are to -beused, the template :slide' 98 may be released by loosening the socket head 'cap screw at and by rotating the knurled lknob- -92 of screw- 93 .tothe front of the template frame 35; as viewed in Figs 19 and 20. Thisrrotation; by: reason of the threaded engage-- mentiof the. inner: end of the screw 93; with the template-holder 90,: Fig. 21, will a slide the template holder 90 to any desiredposition-which is readily. predetermined by reason of an index line 94 ,2Eig'n1 9g on the templa'te holder or-slide 90' registeringwith the :scale 55 provided on the framer3fiz'; a a

' E. Jdmbs 0f different.-. ut'dth V V The jambs themselves may frequentl-y'vary in width to-correspohd -with-doors of difi'e'rent thickness; As far as the-hinge template 55 is concerned, -Fig. 21, such variations do not make j any tdiiference and noadjustment of the template slide 9it-is necessary. However, the opera-'- tionio'fv' the clamping assembly -2 I is modified in accordance with the width of'the -jamb- I l.

In"Fig. 9 it-will-be observedthat th'e' 'end of v theclower clampingarmed is provided with-"a triangular shaped member or foot 50" pivoted to it'iby means of a pin or-screw 5fia' 'and extending ina direction toward the jaw 381 It will further be observed that the: assembly 21-" as awhole is slidableon asupport or stud iz. extendingout wardly from the frame 36 of the template as semblyswith-a thumb. screw 43 extendingw into a central collar 39'to' clamp the assemblyzl in any; desired position along the hat face, of stud 42; ;The; particular position in which-itgis clamped isrsuchthat the horizontal jaw 38 is just backvof. the'jamb i I, forrexample about ones-eighth inch.. The exact positionqis readily determinediin op.. erating thdsclamps; Kit :is ttomelosey the'zclarnp' When cutting V. a

115 arm-operating handle 48 cannot readily move the actuating arm 41' over center, in which case the clamp assembly :21 is then' spaced a slightly greater distance away from the edgeof the door The triangular shaped member or foot 50, Fig. 9, may be pivoted in a counterclockwise direction about vpin 59a to an extended position, Fig. 9a, thus in effect to increase the overall length of the clamping arm 44 to accommodate wider jambs. If the door jamb H is narrow, so narrow that in order to adjust the clamp to the jamb, as described above, the :end of the triangular shaped member 56 engages the'door'when carried in its extended position by the lower clamping arm' 44, Fig. 9a, the lower clamping varm'Ml is then swungagain to onesideand the triangular memher-.553 rotated; about its pivotalaxis to bring it intotheshortened position shownzin Fig. 9. By thus providing a pivotal point :50a intermediate one side ofthe'triangular member 58, the end of the clamping member 44 can' be lengthenedor shortened asdesired; r;

;It willbe noted, Fig.2, that'only one. of'the three edge-surfaces of theifoot'5il .is solid. As shownin Fig. 9, whenthe foot 59. is rotated to its shortened position for jambs ofnarrow-width, the solidedgeof the foot 50 rests against-the projection MD on the clamping'member or arm 44.- When the footill isrotatedto the position shown in Fig. 9a,'the'solid ,edge of the foot .551 will rest upon the projection or stopg hlc on the clamping member 44;; p

It is furtherto be observed from Fig..9a-, when the; triangular member 50 is in the-position for naximum lengthof thelower clamping member 44; the outer end 581) thereof is disposed at a position higher than the end 500 adjacent the pivot point 50a. Thisis done for the reason that as the lower; clamping member 44 rises during theclamping movement, the action is'such as to lift the edge of th jamb adjacent-the door to prevent bindingand to insure that the jamb may beeasily moved up to and against theiocating surface on the bottom edge ,Of the frame. 36 .of thetemplate assembly. If the leading end Sflbof thefoot i] ,were lower than thBJODDOSitGnBIld. 58c, it-has been found with a wide-jamb there is; a tendency for the jamb to press against-the: door and not to be moved upwardly into registered position with the template frame 36.

When the triangular memberfifl ismovedltoitsshortened position, Fig. 9, the leading end 50d; of the triangular member 50 then is lower-than the rearward end 50b. For the narrower jamb, the bindingof the edges against the door has not been of any consequence. The latter, inclination described has been found desirablein order to insure that the narrowerjambs will be clamped in position solidly against locating. surfaceszhon the bottom of the template frame 36. and in avoid ance of angular positioning thereof, whichmight result had the aforesaid inclination not'been provided. In other words, the inclinatiomis such. that in-the clamped position the triangular meme her- 50 extends parallel to the faceof the tem- F."Square'-edge doors; and beveZed -e'dg e doors As previously mentioned, the template 55 in frame 36 is located at slightly greater thanright angles to the sides of the door, the angle being approximately 93 /2, the purpose of which will now be described. It is common practice today toprovide wooden doors either with-their hinge 7 an angle with respect totheholes.

receiving edges square with the faces of the door, or at an inclined, angle thereto. It will first be assumed that inithe doorlofFig. 1, the edges were square withthe faces; With ahinge-receivin'giedge lfla square with the face, it will be observed, Fig. 21, that the hinge edge of the door rests within and against the flat faces 36a out along the lower edges'of the template frame and at opposite endsfthereof. These straight locating surfaces 36a are at right angles to the. locating surface 10a of the door-engagingsection'lfl of the frameSt. Since, the surfaces 3'Sa of the horizontal part ofthe frame36 are nearer the upper surface'of the template at one edge than the other, it will be'seen that the router 5| will cut hinge seats which are slightly deeper along that: edge than along the opposite edge. The finished hinge seat 51 tapers at an angle of approximately 13 from the open end of the hinge seat to the rear. prevent the door from being .hinge-bound, and provides thenecessary clearance in the event the screws which are used in the hinge should not accurately seat in the beveled holes provided therefor, this being a circumstance which frequently arises when the screws are inserted at An important feature of the locatingsurfaces for thehinge-receiving edge of the door resides in the fact that in the region 35b to the left of the portion36a engaged by the square doorthe angle is changed and the depth i's'less. By providing this double arrangement on the locating surface, the template assembly is made uniform both for doors With-square edges on the hinge seat and for doors with inclined edges on the hinge, seat; Where the door has an inclined edge as shown in Fig. 21a, and where the bevel is illustrated as approximately 3 /2", it will be seen that the edge adjacent the open end of the hinge recess engages the surface 362) and thus locates the template 55 for a hinge seat .5111 which is parallel :with the inclned edge of the door. Thus, the hinge jig assembly may be used interchangeably and without further adjustment on doors of the twodifferent'types, and yet whenthe hinges are located in their respective hinge seats therewill be adequate clearance between the faces of the hinge when the door and, therefore, the hinges are in the closed position.

G. The clamping accessory Frequently the'door frames are made'of steel with hinges welded thereto. Thus, there is no longer any need for *routing a hinge seat in the door jamb. Inaccordancewith the present invention,.the assembly is readily adapted for routing hinge seats in. the doors alone, an accessory being provided which performs a plurality of functions. The clamping accessory or filler-block assembly 96, Figs'i'24 and' 25, comprises a'body member 9'! which not only carries a block of wood 98'totake the place of the doorjamb in clamping relation against the door to prevent splitting of the edges during .thefrouting of the hing'es'eat, but'also includes a guiding element 99'extending into registration with the template -55'and"forming a guiding edge for the routeril, Fig; 26. Theguiding ele'ment 99' serves todecrease the effective area of the opening in the template '55 so that the same template may be used for routing seats in a door alone, Fig. 26, as was used in the routing operation on the door and jamb together, Fig. 21'. The filler-block assembly '96 is provided 'with'two guide plates I00,

The taper is provided to 

